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Sat, 24 Oct 2026 19:37:05 +0000 From: Eliav Farber To: Thomas Gleixner , Antoine Tenart CC: Radu Rendec , , , Eliav Farber Subject: [PATCH v2 5/5] irqchip/alpine-msi: Add debug logging for MSI allocation Date: Sat, 24 Oct 2026 19:36:20 +0000 Message-ID: <20261024193620.39999-6-farbere@amazon.com> X-Mailer: git-send-email 2.47.3 In-Reply-To: <20261024193620.39999-1-farbere@amazon.com> References: <20261024193620.39999-1-farbere@amazon.com> X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Content-Type: text/plain X-ClientProxiedBy: EX19D031UWC003.ant.amazon.com (10.13.139.252) To EX19D001UWA001.ant.amazon.com (10.13.138.214) Add log messages to help follow the driver flow when debugging: an info message on successful initialisation, and debug messages on the MSI interrupt allocation and free paths. Signed-off-by: Eliav Farber --- v2: - Use %u for unsigned values (Radu). - Write MSI/SPI in upper case, to match patch 4. drivers/irqchip/irq-alpine-msi.c | 10 ++++++++++ 1 file changed, 10 insertions(+) diff --git a/drivers/irqchip/irq-alpine-msi.c b/drivers/irqchip/irq-alpine-msi.c index fb84b6046193..c13646c763d3 100644 --- a/drivers/irqchip/irq-alpine-msi.c +++ b/drivers/irqchip/irq-alpine-msi.c @@ -104,6 +104,8 @@ static int alpine_msix_middle_domain_alloc(struct irq_domain *domain, unsigned i struct alpine_msix_data *priv = domain->host_data; int sgi, err, i; + pr_debug("trying to allocate %u MSIs starting from %u\n", nr_irqs, virq); + sgi = alpine_msix_allocate_sgi(priv, nr_irqs); if (sgi < 0) return sgi; @@ -116,6 +118,9 @@ static int alpine_msix_middle_domain_alloc(struct irq_domain *domain, unsigned i irq_domain_set_hwirq_and_chip(domain, virq + i, sgi + i, &middle_irq_chip, priv); } + + pr_debug("allocated %u MSIs starting from %u\n", nr_irqs, virq); + return 0; err_sgi: @@ -132,6 +137,8 @@ static void alpine_msix_middle_domain_free(struct irq_domain *domain, unsigned i irq_domain_free_irqs_parent(domain, virq, nr_irqs); alpine_msix_free_sgi(priv, d->hwirq, nr_irqs); + + pr_debug("freed %u MSIs starting from %u\n", nr_irqs, virq); } static const struct irq_domain_ops alpine_msix_middle_domain_ops = { @@ -235,6 +242,9 @@ static int alpine_msix_init(struct device_node *node, struct device_node *parent if (ret) return ret; + pr_info("initialized successfully, SPI %u to %u\n", + priv->spi_first, priv->spi_first + priv->num_spis - 1); + retain_and_null_ptr(priv); retain_and_null_ptr(msi_map); return 0; -- 2.47.3